Chair tightener



July 17, 1923.

C. FISCHER CHAIR TIGHTENER Filed April 5. 1922 r m a Patented July 17, 1923.

UNITE CHARLES rrsennn, orconnwernn, onro."

CHAIR TIGHTENEB.

Application filed April 5,

TaaZZwlwm-it mayconcern: 1

Be it known that 1, CHARLES VFrsonnn, a citizen of the United States, residing at Goldwater, in the county of hlercer and State of Ohio, have invented certain new anduseful Improvements in Chair Tighteners, of which the following is a specification, reference beinghad to the .flCGOH-"l panyi-ng drawings. V

This invention relates to certain improvements in chair tighteners and it is an object of .the invention to ;,provide a device :of this general character having novel and improved means whereby a chair may be maintained rigid and at the same time effectively braced to offset extreme or rough usage.

Another object of the invention is to provide a novel and improved device of this general character which is operatively .en-

gaged with the seat of the chair and the sup porting members or legs therefor and in a manner to effectively brace or reinforce the chair structure and at the .same time to maintain the parts of such structure in a tightened condition.

Furthermore, it is an object of the in vention to provide a novel and improved device .of this general character adapted to be .operatively engaged with the seat of a chair structure and with the supporting menibers :or legs together with tensioning means whereby the legs are held tightened, said device when applied also serving to strengthen or reinforce the seat structure.

The invention consists :in the details of construction and in the combination and arrangementof the several parts of my ,ianproved chair tightener whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the ac companying drawings. wherein:

Figure 1 is an elevat'onal view of a chair structure showing a tightener applied thereto constructed in accordance with an embodiment of my invention,

Figure 2 is a View in bottom plan of the structure as illustrated in Figure 1,

Figure 3 is a longitudinal sectional view 1922. :Serial No. $549,781.

on an enlarged scale taken through my i'lHlproved tightenencertain of the parts being in fragment, I w

Figure 4: is a view in perspective of the plate adapted to be secured to the chair seat, and r i Figure :5 is a view in perspective of the second plate hereindisclosed. 1 its disclosed in the accon ipanying drawing S denotes the seat of a chair structure having associated therewith the supporting meinbcrscr legs L'of a-conventionaltype.

.Secured; to theunder surface of athe seat Sis an elongated metallic plate .1, saidplate being secured tothe seat S through the in-. strumentality of the screws 2 or the like. This plate 1 when applied also serves to strengthen or reinforce the seat.

At its center portion the plate 1 is provided with an opening-3 through which is disposed a headed shank or bolt 4, the head a of said boltbeing above the plate 1, said head being preferably of atapered form anc snugly received in the opening y 5 .5 denotes a second plate of a relatively short-length and whichis provided with a centeriopen-ing .6 through which the threaded shank a is freely disposed. Threaded @upon the shank 4 below the plate 5, is a wing nut 7 or the like which maintains the plate 5 against displacement, and is operated to force the :plate 5 toward the plate. 1 as the necessities of practice may require.

Each end portion of theplate 5 is-provided with two transversely spaced openings .8 and freely disposed through each of said openingsis a rod 9 One end portion of therod 9 is provided with ahead 10 to engage \or contact with theyplate 5 from above and of a diameter greater than the diameter of the opening 8. The opposite end portion of the rod 9 is engaged with an eye screw 11 which is fastened to a supporting member or leg L at a desired point thereon.

lYith my improved device applied and by proper turning of the nut 7 the plate 5 is forced toward the plate 1, resulting in tension being imposed upon the rods 9. the pull imposed upon the supporting members or legs L maintaining said legs and the structure associated therewith in a tightened condition. The device when applied also serves to strengthen or reinforce the chair structure.

Adjacent the opposite end thereof, the

plate 5 is provided with the openings 12 alined longitudinally of the plate 5 and with the openings 6. Freely disposed through the openings 12 are the arms 14 depending from the plate 1 and which arms 14 serve to hold plate. 5' against turning movement and thereby assuring the maintenance of said plate in proper position.

As herein disclosed, the arms Mare struck out, from the plate 1 and pressed or otherwise bent'into desired position.

From the foregoing description it is thoughtto be obvious that a chair tightener constructed in accordance with my invention is particularly well adapted for use by reason ,of the convenience and facility with which it may be assembled and operated,

and it will also be obviousthat my invention is susceptible of some change and modification without departingfrom the principles and spirit thereof and for this reason I do not wish to be understood'as limiting myself to the'precise arrangement and formatlon of inafter claimed.

the several-parts herein shown in carrying out my lnventlon 1n practlce except as here- I claim:

1. In combination with theseat and the associated supporting members of a chair structure, a platese'cured to the under sur face of theseat, a member depending from said plate, a second plate having an opening through whichthe member is freely disposed a nut threaded upon the member below'the second plate, means carried by the first named plate and'co acting with the second plate to hold the second plate against turning movement, and members connecting the second plate and the supporting members of the chairstructure:

2; In combination with the seat and the associated supporting members of a chair structure, a plate secured tothe under sur face of the seat, a member depending from said plate, a second plate having an opening through which the member is freely disposed, a nut-threaded upon the member below the second'pl ate, armsdepending from the first plate and 'co 'acting with the second plate to hold the second plate against turning movement, and members connecting the second plate and the supporting members of the chair structure.

3. In combination with the seat and the associated supporting members of a chair structure, a plate secured to the under surfaceof the seat, a member depending from said plate, a second plate having an open ing through which the member is freely disposed. a nut threaded upon the member below the second plate, arms depending from the first plate and freely'disposed' through the second plate to hold the second plate against turning movement, and members connecting the second plate and supnorting members of the chair structure.

4. In combination with a seat and the associated supporting members df a chair structure, a plate secured to the under sur face of the seat, a member depending from said plate, a second plate having an opening through which the member is freely dis posed. a nut threaded upon the member besaid plate, a second plate having an opening 7 through which the member is freely disposed. a nutthreaded upon the member below the second plate, depending arms struck from the first plate and co-acting with the second plateto' hold the second plate against turning. movement, and members connecting the second plate and the supporting members'of the"chair structure.

In testimony whereof I hereunto 'aflix my signature.

CHARLES FISCHER- 

